CN102056297B - Random access method and equipment in multi-carrier system - Google Patents
Random access method and equipment in multi-carrier system Download PDFInfo
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- CN102056297B CN102056297B CN 200910236847 CN200910236847A CN102056297B CN 102056297 B CN102056297 B CN 102056297B CN 200910236847 CN200910236847 CN 200910236847 CN 200910236847 A CN200910236847 A CN 200910236847A CN 102056297 B CN102056297 B CN 102056297B
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Abstract
The embodiment of the invention discloses a random access method and equipment in a multi-carrier system. The technical scheme proposed by the embodiment of the invention is applied to confirm that a treatment flow of a random access process can be issued in a plurality of uplink carriers in a mobile communication system by introducing the multi-carriers so as to issue random access treatment in the multi-carrier system.
Description
Technical field
The embodiment of the present invention relates to communication technical field, particularly accidental access method and the equipment in a kind of multicarrier system.
Background technology
At senior Long Term Evolution (Long Term Evolution Advanced, LTE-A) in system, to the requirement of peak rate than Long Term Evolution (Long Term Evolution, LTE) system has improved a lot, peak rate on down direction requires to reach 1Gbps, and the peak rate on up direction requires to need to reach 500Mbps.Simultaneously, the LTE-A system also requires to have good compatibility with the LTE system.
Based on improve peak rate, with LTE system compatible and the needs that take full advantage of frequency spectrum resource, the LTE-A system has introduced carrier aggregation (Carrier Aggregation, CA) technology.
Carrier aggregation technology refers to respectively comprise on up-downlink direction in a residential quarter technical scheme of a plurality of member carriers (Component Carrier, CC), rather than LTE and before wireless communication system in only have the pattern of a cover carrier wave.
In the system of carrier aggregation, each member carrier can be continuous, can be also discrete.For with the LTE system compatible, the maximum bandwidth of each member carrier of LTE-A system is 20MHz, the bandwidth between each member carrier can be identical, also can be different.
Introduce carrier aggregation technology in the LTE-A system after, due to a subscriber equipment (UserEquipment, UE) may be simultaneously operated on a plurality of member carriers, if these member carriers are network side according to the member carrier of cell management, so, from network side, just can see that this UE carries out with a plurality of residential quarters simultaneously alternately.
Owing to encrypting key and network attached storage (the Network AttachedStorage that uses in the UE connection procedure, NAS) needs of mobile management, the situation of the information of certain specific cell that is connected with this UE may occur using, such specific cell just is called particular cell (special cell).
In the LTE system, also there is random access mechanism, the reason of random access mechanism mainly comprises following several:
Situation 1, from the state of RRC_IDLE, namely access under the state of Radio Resource free time, also referred to as initial access (initial access).
Because of Radio Link Failure, and initiate to access in the situation of RRC connection reconstruction in situation 2, current system, this is also a kind of of initial access.
In situation 3, handoff procedure, need to carry out accessing in random situation about accessing.
When situation 4, UE are in the RRC_CONNECTED state, if there is downlink data to arrive, access.
When situation 5, UE are in the RRC_CONNECTED state, if there is upstream data to arrive, access.
For there being downlink data arrive and switch two kinds of situations (being above-mentioned situation 3 and situation 4), if special-purpose lead code (Preamble) is arranged in current system, can use non-competing random access.
In existing technical scheme, the schematic flow sheet of non-competing random access procedure mainly comprises the following steps as shown in Figure 1:
The special-purpose RA-PreambleIndex that is used in non-competing random access (Random Access-Preamble Index is divided to UE in step S101, base station, the random access lead code sign) and at random access Physical Random Access Channel (the Physical Random Access CHannel that uses, PRACH) RA-PRACH-MaskIndex of resource (Random Access-PRACH Mask Index accesses PRACH sign numbering at random).
Arrive the non-competing random access procedure that causes for downlink data, use Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) carry these information, and for switching caused non-competing random access procedure, (handover command) carries these information by switching command.
Step S102, UE on the PRACH of appointment resource, send the dedicated preamble of appointment according to RA-PreambleIndex indicated in step S101 and RA-PRACH-MaskIndex to the base station.
After step S103, base station receive the dedicated preamble of appointment, calculate the corresponding uplink timing advance of this UE (Timing Advance, TA) according to this dedicated preamble.
Step S104, base station send accidental access response to UE, comprise Timing Advance information in accidental access response, the Timing Advance of the follow-up uplink of notice UE.
The random access procedure that all random access reasons (being above-mentioned situation 1, situation 2 and situation 5) cause for other all can use the random access of competition.
In existing technical scheme, the schematic flow sheet of competition random access procedure mainly comprises the following steps as shown in Figure 2:
Step S201, UE select random access preamble and PRACH resource, and utilize this PRACH resource to send selected random access preamble to the base station.
Step S202, base station receive the random access preamble that UE sends, and calculate Timing Advance (TA), and send accidental access response to UE.
At least comprise this Timing Advance information in accidental access response and for uplink authorization (Uplink grant, the UL grant) information of subsequent step.
Step S203, UE send uplink transmission data according to the UL grant information that receives to the base station on corresponding UL grant resource.
For different random access reason, the content of the uplink transmission data that step S203 sends is different, such as, for initial access, what step S203 transmitted is that RRC connects the request of foundation.
Step S204, UE receive the competition of returning the base station and solve message.
UE solves message according to the competition that receives, and can judge whether random access is successful.
In realizing the process of the embodiment of the present invention, the inventor finds that there is following problem at least in prior art:
There is no in the LTE-A agreement at present how multicarrier system accesses at random and failure associated description afterwards.
Summary of the invention
The embodiment of the present invention provides accidental access method and the equipment in a kind of multicarrier system, realizes the processing after multicarrier system accesses at random and is failed.
For achieving the above object, the embodiment of the present invention provides the accidental access method in a kind of multicarrier system on the one hand, specifically comprises the following steps:
When the terminal that works in simultaneously a plurality of carrier waves needed initiating random access procedure, described terminal was selected a carrier wave, to the base station initiating random access procedure according to default first carrier selection strategy in a plurality of carrier waves of self working;
After described terminal is failed to the base station initiating random access procedure by the selected carrier wave of described first carrier selection strategy, described terminal is according to the second default carrier wave selection strategy, one or more carrier waves are selected in continuation in other carrier waves of working at self, to described base station initiating random access procedure;
Wherein, when described terminal judges reached default report condition, described terminal reported the random access problems indication information to the rrc layer of self correspondence.
Preferably, described terminal is selected a carrier wave according to default first carrier selection strategy in a plurality of carrier waves of self working, and to the base station initiating random access procedure, is specially a kind of in following situation:
Described terminal is carrier wave of random selection in current all optional up-link carriers, to the base station initiating random access procedure;
Described terminal reaches random in the up-link carrier of preset state threshold value at the included Link State of current all optional up-link carriers and selects a carrier wave, to the base station initiating random access procedure;
Described terminal is selected current all optional up-link carrier links carrier wave in the best state, to the base station initiating random access procedure;
Described terminal is selected the corresponding up-link carrier of particular cell Special Cell, to the base station initiating random access procedure.
Preferably, described current all optional up-link carriers specifically comprise:
All up-link carriers that described terminal is worked; Or,
Described terminal work all have the up-link carrier of random access resource configuration; Or,
The described terminal of permission by the network side configuration is initiated random all up-link carriers that access; Or,
Do not reach the up-link carrier of default unsuccessful condition in all up-link carriers that described terminal is worked; Or,
In all up-link carriers that described terminal is worked, be in the up-link carrier of state of activation; Or,
In all up-link carriers that described terminal is worked, be in state of activation, and do not reach the up-link carrier of default unsuccessful condition.
Preferably, described default unsuccessful condition is specially:
At the appointed time carry out random access in scope, and reached still random access failure of maximum times.
Preferably, after described terminal was initiated described random access procedure failure, described terminal continued to select one or more carrier waves according to the second default carrier wave selection strategy in other carrier waves of working at self, to described base station initiating random access procedure, be specially a kind of in following situation:
Described terminal is chosen one or more carrier waves at random in remaining carrier set, to the base station initiating random access procedure;
Described terminal is selected a best carrier wave of Link State in remaining carrier set, to the base station initiating random access procedure;
Described terminal is at the up-link carrier from current initiating random access procedure failure selects one or more carrier waves in the residue carrier wave of different coverings, to the base station initiating random access procedure;
Described terminal has at the up-link carrier from current initiating random access procedure failure selects one or more carrier waves in the carrier wave of different Timing Advance TA, to the base station initiating random access procedure.
Preferably, described terminal judges reaches default report condition, specifically comprises one or more of following situation:
The frequency of failure of described terminal initiating random access procedure in current all carrier waves of self working reaches the maximum frequency of failure of configuration respectively;
Described terminal can not be by any one carrier wave to base station success initiating random access procedure in default time range;
Described terminal after the failure of base station initiating random access procedure, in default time range, can not be passed through any one other carrier wave to base station success initiating random access procedure by the selected carrier wave of described first carrier selection strategy;
After described terminal retransmits preamble in each carrier wave total degree has reached default retransmission threshold value, still can not be to base station success initiating random access procedure;
After described terminal is failed to described base station initiating random access procedure by the selected carrier wave of described first carrier selection strategy, after the total degree of re-transmission preamble has reached default retransmission threshold value in described the second carrier wave, still can not be to described base station success initiating random access procedure; Or,
Described terminal is failed to the base station initiating random access procedure by the corresponding carrier wave of particular cell Special Cell;
Described terminal is failed to the base station initiating random access procedure by the best carrier wave of Link State;
The number of carriers that described terminal initiating random access procedure is attempted reaches default number of carriers threshold value.
On the other hand, the embodiment of the present invention also provides a kind of terminal, is applied to the random access in multicarrier system, specifically comprises:
Module is set, is used for arranging first carrier selection strategy, the second carrier wave selection strategy and report condition;
random access module, be used for when the terminal that works in simultaneously a plurality of carrier waves needs initiating random access procedure, according to the described set first carrier selection strategy of module that arranges, select a carrier wave in a plurality of carrier waves of self working, to the base station initiating random access procedure, maybe when passing through the selected carrier wave of described first carrier selection strategy after the failure of base station initiating random access procedure, according to described the second set carrier wave selection strategy of module that arranges, one or more carrier waves are selected in continuation in other carrier waves of working in described terminal, to described base station initiating random access procedure,
Judge module is used for judging whether described random access module reaches the described set report condition of module that arranges when the state of forward direction described base station initiating random access procedure;
Sending module is used for judging when the state of forward direction described base station initiating random access procedure reaches described report condition when described judge module, reports the random access problems indication information to rrc layer corresponding to described terminal.
Preferably, the described set first carrier selection strategy of module that arranges is specially a kind of in following situation:
Carrier wave of random selection in current all optional up-link carriers is to the base station initiating random access procedure;
Reach random in the up-link carrier of preset state threshold value at the included Link State of current all optional up-link carriers and select a carrier wave, to the base station initiating random access procedure;
Select current all optional up-link carrier links carrier wave in the best state, to the base station initiating random access procedure;
Select the corresponding up-link carrier of Special Cell, to the base station initiating random access procedure.
Preferably, described current all optional up-link carriers specifically comprise:
All up-link carriers that described terminal is worked; Or,
Do not reach the up-link carrier of default unsuccessful condition in all up-link carriers that described terminal is worked; Or,
In all up-link carriers that described terminal is worked, be in the up-link carrier of state of activation; Or,
In all up-link carriers that described terminal is worked, be in state of activation, and do not reach the up-link carrier of default unsuccessful condition.
Preferably, described default unsuccessful condition is specially:
At the appointed time carry out random access in scope, and reached still random access failure of maximum times.
Preferably, described the second set carrier wave selection strategy of module that arranges is specially a kind of in following situation:
Choose at random one or more carrier waves in remaining carrier set, to the base station initiating random access procedure;
Select a best carrier wave of Link State in remaining carrier set, to the base station initiating random access procedure;
Be at the up-link carrier from current initiating random access procedure failure and select one or more carrier waves in the residue carrier wave of different coverings, to the base station initiating random access procedure;
Have at the up-link carrier from current initiating random access procedure failure and select one or more carrier waves in the carrier wave of different TA, to the base station initiating random access procedure.
Preferably, the described random access module of described judge module judgement specifically comprises one or more of following situation when the state of forward direction described base station initiating random access procedure reaches the described set report condition of module that arranges:
Described judge module judges the frequency of failure of described random access module initiating random access procedure in all carrier waves that current described terminal is worked, and reaches respectively the maximum frequency of failure of configuration;
The judge module judgement is in default time range, and described random access module can not be by any one carrier wave to base station success initiating random access procedure;
After the described random access module of judge module judgement is failed to the base station initiating random access procedure by the selected carrier wave of described first carrier selection strategy, in default time range, can not be by any one other carrier wave to base station success initiating random access procedure;
After the described random access module of judge module judgement retransmits preamble in each carrier wave total degree has reached default retransmission threshold value, still can not be to the base station successful initiating random access procedure;
The described random access module of judge module judgement is failed to the base station initiating random access procedure by the corresponding carrier wave of particular cell Special Cell;
The described random access module of judge module judgement is failed to the base station initiating random access procedure by the best carrier wave of Link State;
The number of carriers that the described random access module initiating random access procedure of judge module judgement is attempted reaches default number of carriers threshold value.
Compared with prior art, the embodiment of the present invention has the following advantages:
The technical scheme that proposes by using the embodiment of the present invention, clear and definite in mobile communication system due to the introducing of multicarrier, handling process that can initiating random access procedure in a plurality of up-link carriers, thereby, can initiate random access and process in multicarrier system.
Description of drawings
Fig. 1 is the schematic flow sheet of a kind of non-competing random access procedure of the prior art;
Fig. 2 is a kind of schematic flow sheet of competing random access procedure of the prior art;
Fig. 3 is the schematic flow sheet of the accidental access method in a kind of multicarrier system of proposing of the embodiment of the present invention;
Fig. 4 is the schematic flow sheet of the accidental access method in a kind of multicarrier system of proposing of the embodiment of the present invention one;
Fig. 5 is the schematic flow sheet of the accidental access method in a kind of multicarrier system of proposing of the embodiment of the present invention two;
Fig. 6 is the schematic flow sheet of the accidental access method in a kind of multicarrier system of proposing of the embodiment of the present invention three;
Fig. 7 is the schematic flow sheet of the accidental access method in a kind of multicarrier system of proposing of the embodiment of the present invention four;
Fig. 8 is the stream of the accidental access method in a kind of multicarrier system of proposing of the embodiment of the present invention five
Fig. 9 is the schematic flow sheet of the accidental access method in a kind of multicarrier system of proposing of the embodiment of the present invention six;
Figure 10 is the schematic flow sheet of the accidental access method in a kind of multicarrier system of proposing of the embodiment of the present invention seven;
Figure 11 is the structural representation of a kind of terminal of proposing of the embodiment of the present invention.
Embodiment
In order to solve problems of the prior art, the accidental access method in a kind of multicarrier system that the embodiment of the present invention proposes, the method is applied to comprise in the system of a plurality of base stations and a MCE.
As shown in Figure 3, the schematic flow sheet for the accidental access method in a kind of multicarrier system of embodiment of the present invention proposition specifically comprises the following steps:
Step S301, when the terminal that works in simultaneously a plurality of carrier waves needs initiating random access procedure, terminal is selected a carrier wave, to the base station initiating random access procedure according to default first carrier selection strategy in a plurality of carrier waves of self working.
In concrete application scenarios, the realization flow of this step is specially a kind of in following situation:
Terminal is carrier wave of random selection in current all optional up-link carriers, to the base station initiating random access procedure;
Terminal reaches random in the up-link carrier of preset state threshold value at the included Link State of current all optional up-link carriers and selects a carrier wave, to the base station initiating random access procedure;
Terminal is selected current all optional up-link carrier links carrier wave in the best state, to the base station initiating random access procedure;
Terminal is selected the corresponding up-link carrier of particular cell Special Cell, to the base station initiating random access procedure.
Wherein, current all optional up-link carriers specifically comprise:
All up-link carriers that terminal is worked; Or,
Terminal work all have the up-link carrier of random access resource configuration; Or,
Initiate random all up-link carriers that access by the permission terminal of network side configuration; Or,
Do not reach the up-link carrier of default unsuccessful condition in all up-link carriers that terminal is worked; Or,
In all up-link carriers that terminal is worked, be in the up-link carrier of state of activation; Or,
In all up-link carriers that terminal is worked, be in state of activation, and do not reach the up-link carrier of default unsuccessful condition.
Need to further be pointed out that, above-mentioned default unsuccessful condition is specially:
At the appointed time carry out random access in scope, and reached still random access failure of maximum times.
Whether step S302, terminal judges are passed through the selected carrier wave of first carrier selection strategy successful to the base station initiating random access procedure.
If success is according to the existing random flow performing subsequent operation afterwards that access successfully;
If failure, execution in step S303 wherein, unsuccessfully refers to reach maximum attempts and still can not access successfully at random.
Whether step S303, terminal judges reach default report condition.
If reach, execution in step S304;
If do not reach, execution in step S305.
In concrete application scenarios, terminal judges reaches default report condition, specifically comprises one or more of following situation:
The frequency of failure of terminal initiating random access procedure in current all carrier waves of self working reaches the maximum frequency of failure of configuration respectively;
Terminal can not be by any one carrier wave to base station success initiating random access procedure in default time range;
Terminal after the failure of base station initiating random access procedure, in default time range, can not be passed through any one other carrier wave to base station success initiating random access procedure by the selected carrier wave of first carrier selection strategy;
After terminal retransmits preamble in each carrier wave total degree has reached default retransmission threshold value, still can not be to base station success initiating random access procedure;
After terminal is failed to the base station initiating random access procedure by the selected carrier wave of described first carrier selection strategy, after the total degree of re-transmission preamble has reached default retransmission threshold value in the second carrier wave, still can not be to base station success initiating random access procedure; Or,
Terminal is failed to the base station initiating random access procedure by the corresponding carrier wave of Special Cell;
Terminal is failed to the base station initiating random access procedure by the best carrier wave of Link State;
The number of carriers that the terminal initiating random access procedure is attempted reaches default number of carriers threshold value.
Step S304, terminal report the random access problems indication information to self corresponding rrc layer.
Step S305, terminal continue to select one or more carrier waves in other carrier waves of working at self, to the base station initiating random access procedure according to the second default carrier wave selection strategy.
It needs to be noted; if above-mentioned report condition is to be set as when namely reporting the random access problems indication information after default time range arrives; in the process that this step is carried out; if arrive default time range; direct rrc layer to terminal self correspondence reports the random access problems indication information; this is the flow process adjustment of carrying out according to concrete report condition, and such variation can't affect protection scope of the present invention.
In concrete application scenarios, the realization flow of this step is specially a kind of in following situation:
Terminal is chosen one or more carrier waves at random in remaining carrier set, to the base station initiating random access procedure;
Terminal is selected a best carrier wave of Link State in remaining carrier set, to the base station initiating random access procedure;
Terminal is at the up-link carrier from current initiating random access procedure failure selects one or more carrier waves in the residue carrier wave of different coverings, to the base station initiating random access procedure;
Terminal has at the up-link carrier from current initiating random access procedure failure selects one or more carrier waves in the carrier wave of different Timing Advance TA, to the base station initiating random access procedure.
Whether step S306, terminal judges are passed through the second selected carrier wave of carrier wave selection strategy successful to the base station initiating random access procedure.
If success is according to the existing random flow performing subsequent operation afterwards that access successfully;
If failure, execution in step S303.
It is pointed out that said unsuccessfully has a lot of levels here:
If carrier wave is attempted successively one by one, reach the still not success of maximum attempts of configuration on the carrier wave of each selection, be failure, then select next the continuation to attempt;
If initiate simultaneously the random access on a plurality of carrier waves, configure the maximum times that a plurality of carrier waves are attempted sum, each failure of each carrier wave all need judge whether to reach report condition;
If configured the trial timer, need the real-time judge timer whether overtime, if overtime, would be unsuccessfully.
Compared with prior art, the embodiment of the present invention has the following advantages:
The technical scheme that proposes by using the embodiment of the present invention, clear and definite in mobile communication system due to the introducing of multicarrier, handling process that can initiating random access procedure in a plurality of up-link carriers, thereby, can initiate random access and process in multicarrier system.
Below, further combined with concrete example, the technical scheme of the embodiment of the present invention is described.
The embodiment of the present invention provides the accidental access method in a kind of multicarrier system, in the situation that UE needs initiatively to initiate the random access of competition to network side, choose a carrier wave according to certain rule and initiate the competition random access procedure according to the process of R8 in all available up-link carriers.
When the competition random access procedure of UE on a carrier wave reaches maximum attempts when failure still, UE initiates to compete random access again according to other carrier waves of certain rules selection.
And, according to pre-conditioned, reporting the random access problems indication to RRC, rrc layer is initiated subsequent treatment according to current state, as RRC connection reconstruction process.
Wherein, when UE needs initiatively to initiate the random access of competition, select the principle of up-link carrier to be:
(1) select at random in all optional up-link carriers.
(2) its link meets some requirements and selects at random in the up-link carrier subset of (for example, path loss is lower than the threshold value of configuration and/or the received signal power threshold value higher than configuration) in all optional up-link carriers.
(3) when all optional up-link carriers all do not satisfy specific link condition (for example, path loss lower than the configuration threshold value and/or received signal power higher than the configuration threshold value), select the best up-link carrier of all up-link carrier link conditions.
(4) select up-link carrier corresponding to Special cell.
(5) select in all optional up-link carriers that link condition is best (need to consider path loss, expectation received power, UE maximum transmission power and the various power headroom parameters etc. of configuration select to send that the highest carrier wave of the probability of success according to existing measurement and configuration in a word) up-link carrier.
Wherein, optional up-link carrier set can be:
Configuration is to the set of all up-link carriers compositions of UE; Or,
The set that the up-link carrier that configuration wherein activates to all up-link carriers of UE forms; Or,
Remove in above-mentioned set and carried out accessing at random in time T 1 scope and reached the still set after failed up-link carrier of maximum times.
UE reaches maximum times not yet after success at a certain up-link carrier initiating random access procedure, chooses new up-link carrier and again initiates the principle of random access and can be:
(1) choose at random a up-link carrier in remaining carrier set.
(2) select a best up-link carrier of link condition in remaining carrier set.
(3) select to initiate simultaneously random access more than a up-link carrier on all residue up-link carriers.
(4) from each carrier set of the different coverings of this up-link carrier in all select a carrier wave to initiate simultaneously random access.
(5) all select a carrier wave to initiate simultaneously random access in each carrier set different from this up-link carrier TA set.
The MAC layer of UE reports the trigger condition of random access problems indication to comprise to rrc layer:
UE has attempted the up-link carrier of all configurations and has initiated random access, all reaches the still not success of maximum times of configuration.
UE can't initiate successful random access at any one up-link carrier in time T 2 scopes.
UE in time T 3 scopes, can't initiate successful random access at any one remaining up-link carrier after first up-link carrier random access failure.
UE still can't access successfully after the total degree of each up-link carrier re-transmission preamble has reached thresholding N1 at random.
UE initiates random access failure at up-link carrier corresponding to special cell.
UE initiates random access failure at the best up-link carrier of link condition.
The CC/CC group quantity that UE attempts surpasses thresholding.
Below by specific embodiment, technical scheme of the present invention is described:
As shown in Figure 4, when the schematic flow sheet of the accidental access method in a kind of multicarrier system that proposes for the embodiment of the present invention one, UE were initiated the random access of competition at needs, its process and subsequent treatment comprised the following steps:
Step S401, UE select up-link carrier CC1 corresponding to special cell, according to the similar process of R8, send Msg1, and wait for reception Msg2 and carry out subsequent process.
Wherein, Msg1 is specially the message of the information such as RA-PRACH-MaskIndex of the PRACH resource that comprises special-purpose RA-PreambleIndex and random access use; Msg2 is specially accidental access response message; for convenience of description; also adopt identical abbreviation in each follow-up embodiment; repeated description no longer in subsequent embodiment, the variation of concrete appellation does not affect protection scope of the present invention.
Step S402, as UE after CC1 random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC1 according to existing flow process.
If step S403 UE has surpassed the maximum attempts of configuration at the number of times that up-link carrier CC1 corresponding to special cell attempts random access, report the random access problems indication to rrc layer.
As shown in Figure 5, when the schematic flow sheet of the accidental access method in a kind of multicarrier system that proposes for the embodiment of the present invention two, UE were initiated the random access of competition at needs, its process and subsequent treatment comprised the following steps:
Step S501, UE choose a up-link carrier CC1 at random in all available up-link carriers, according to the similar process of R8, send Msg1, and wait for reception Msg2 and carry out subsequent process.
Step S502, as UE after CC1 random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC1 according to existing flow process.
If step S503 UE has surpassed the maximum attempts of configuration at the number of times that current up-link carrier CC1 attempts random access, UE chooses a carrier wave CC2 that relative channel condition is best again in the available up-link carrier set of residue, initiating random access procedure, the random access procedure on CC1 can stop also can continuing.
Step S504, as UE after CC2 random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC2 according to existing flow process.
If step S505 UE also surpasses the maximum attempts of configuration at the number of times that up-link carrier CC2 attempts random access, report the random access problems indication to rrc layer.
As shown in Figure 6, when the schematic flow sheet of the accidental access method in a kind of multicarrier system that proposes for the embodiment of the present invention three, UE were initiated the random access of competition at needs, its process and subsequent treatment comprised the following steps:
Step S601, UE choose a up-link carrier CC1 at random in all available up-link carriers, according to the similar process of R8, send Msg1, and wait for reception Msg2 and carry out subsequent process.
Step S602, as UE after CC1 random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC1 according to existing flow process.
If step S603 UE has surpassed the maximum attempts of configuration at the number of times that current up-link carrier CC1 attempts random access, select respectively a up-link carrier in each carrier subset of UE different from the CC1 covering in the available up-link carrier set of residue (perhaps corresponding TA collection is different), for example CC2 and CC3, initiating random access procedure, the random access procedure on CC1 can stop also can continuing.
Step S604, as UE after CC2 (CC3) random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC2 (CC3) according to existing flow process.
If step S605 UE attempts the random number of times that accesses also over the maximum attempts of configuration at up-link carrier CC2 and CC3, report the random access problems indication to rrc layer.
As shown in Figure 7, when the schematic flow sheet of the accidental access method in a kind of multicarrier system that proposes for the embodiment of the present invention four, UE were initiated the random access of competition at needs, its process and subsequent treatment comprised the following steps:
Step S701, UE choose a up-link carrier CC1 at random in all satisfy the up-link carrier (as path loss lower than the threshold value of configuration and/or the received signal power threshold value etc. higher than configuration) of certain condition, if the available up-link carrier of UE does not all satisfy this condition, the best up-link carrier CC1 of selective channel condition, according to the similar process of R8, send Msg1, and wait for reception Msg2 and carry out subsequent process, start simultaneously timer, be designated as T2.
Step S702, as UE after CC1 random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC1 according to existing flow process.
If step S703 UE has surpassed the maximum attempts of configuration at the number of times that current up-link carrier CC1 attempts random access, UE chooses whole up-link carriers in the available up-link carrier set of residue, for example CC2 and CC3, initiating random access procedure, the random access procedure on CC1 can stop also can continuing.
Step S704, as UE after CC2 (CC3) random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC2 (CC3) according to existing flow process.
If it is overtime that step S705 works as T2, the random access that UE does not all succeed at all up-link carrier CC1, CC2 and CC3, perhaps UE attempts the random number of times that accesses also over the maximum attempts of configuration at up-link carrier CC2 and CC3, reports the random access problems indication to rrc layer.
As shown in Figure 8, when the schematic flow sheet of the accidental access method in a kind of multicarrier system that proposes for the embodiment of the present invention five, UE were initiated the random access of competition at needs, its process and subsequent treatment comprised the following steps:
Step S801, UE choose a up-link carrier CC1 at random in all available up-link carriers, according to the similar process of R8, send Msg1, and wait for reception Msg2 and carry out subsequent process.
Step S802, as UE after CC1 random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC1 according to existing flow process.
If step S803 UE has surpassed the maximum attempts of configuration at the number of times that current up-link carrier CC1 attempts random access, UE chooses whole up-link carriers in the available up-link carrier set of residue, for example CC2 and CC3, initiating random access procedure, random access procedure on CC1 can stop also can continuing, start simultaneously timer, be designated as T3.
Step S804, as UE after CC2 (CC3) random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC2 (CC3) according to existing flow process.
If it is overtime that step S805 works as T3, the random access that UE does not all succeed at all up-link carrier CC1, CC2 and CC3, perhaps UE attempts the random number of times that accesses also over the maximum attempts of configuration at up-link carrier CC2 and CC3, reports the random access problems indication to rrc layer.
As shown in Figure 9, when the schematic flow sheet of the accidental access method in a kind of multicarrier system that proposes for the embodiment of the present invention six, UE were initiated the random access of competition at needs, its process and subsequent treatment comprised the following steps:
Step S901, UE choose a up-link carrier CC1 at random in all available up-link carriers, according to the similar process of R8, send Msg1, and wait for reception Msg2 and carry out subsequent process.
Step S902, as UE after CC1 random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC1 according to existing flow process.
If step S903 UE has surpassed the maximum attempts of configuration at the number of times that current up-link carrier CC1 attempts random access, UE chooses whole up-link carriers in the available up-link carrier set of residue, for example CC2 and CC3, initiating random access procedure, random access procedure on CC1 can stop also can continuing, and starts simultaneously Counter and is recorded in number of attempt on CC2 and CC3.
Step S904, as UE after CC2 (CC3) random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC2 (CC3) according to existing flow process, CC2 or CC3 retransmits no matter, the Counter value all adds one.
When if step S905 surpasses the thresholding N1 of configuration when the Counter value, UE reports the random access problems indication to rrc layer in the random access that all up-link carrier CC1, CC2 and CC3 all do not succeed.
As shown in figure 10, when the schematic flow sheet of the accidental access method in a kind of multicarrier system that proposes for the embodiment of the present invention seven, UE were initiated the random access of competition at needs, its process and subsequent treatment comprised the following steps:
Step S1001, UE choose a up-link carrier CC1 at random in all available up-link carriers, according to the similar process of R8, send Msg1, and wait for reception Msg2 and carry out subsequent process.
Step S1002, as UE after CC1 random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC1 according to existing flow process.
If step S1003 UE has surpassed the maximum attempts of configuration at the number of times that current up-link carrier CC1 attempts random access, UE chooses whole up-link carriers in the available up-link carrier set of residue, for example CC2 and CC3, initiating random access procedure, the random access procedure on CC1 can stop also can continuing.
Step S1004, as UE after CC2 (CC3) random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC2 (CC3) according to existing flow process.
If step S1005 UE also surpasses the maximum attempts of configuration half (perhaps another configured threshold value different from common random access maximum attempts) at the number of times that up-link carrier CC2 and CC3 attempt random access, report the random access problems indication to rrc layer.
Compared with prior art, the embodiment of the present invention has the following advantages:
The technical scheme that proposes by using the embodiment of the present invention, clear and definite in mobile communication system due to the introducing of multicarrier, handling process that can initiating random access procedure in a plurality of up-link carriers, thereby, can initiate random access and process in multicarrier system.
In order to realize the technical scheme of the embodiment of the present invention, the embodiment of the present invention has also proposed a kind of terminal, is applied to the random access in multicarrier system, and its structural representation specifically comprises as shown in figure 11:
Preferably, the set first carrier selection strategy of module 1101 is set, is specially a kind of in following situation:
Carrier wave of random selection in current all optional up-link carriers is to the base station initiating random access procedure.
Reach random in the up-link carrier of preset state threshold value at the included Link State of current all optional up-link carriers and select a carrier wave, to the base station initiating random access procedure.
Select current all optional up-link carrier links carrier wave in the best state, to the base station initiating random access procedure.
Select the corresponding up-link carrier of Special Cell, to the base station initiating random access procedure.
Preferably, current all optional up-link carriers specifically comprise:
All up-link carriers that terminal is worked; Or,
Terminal work all have the up-link carrier of random access resource configuration; Or,
Initiate random all up-link carriers that access by the permission terminal of network side configuration; Or,
Do not reach the up-link carrier of default unsuccessful condition in all up-link carriers that terminal is worked; Or,
In all up-link carriers that terminal is worked, be in the up-link carrier of state of activation; Or,
In all up-link carriers that terminal is worked, be in state of activation, and do not reach the up-link carrier of default unsuccessful condition.
Preferably, default unsuccessful condition is specially:
At the appointed time carry out random access in scope, and reached still random access failure of maximum times.
Preferably, the second set carrier wave selection strategy of module 1101 is set, is specially a kind of in following situation:
Choose at random one or more carrier waves in remaining carrier set, to the base station initiating random access procedure.
Select a best carrier wave of Link State in remaining carrier set, to the base station initiating random access procedure.
Be at the up-link carrier from current initiating random access procedure failure and select one or more carrier waves in the residue carrier wave of different coverings, to the base station initiating random access procedure.
Have at the up-link carrier from current initiating random access procedure failure and select one or more carrier waves in the carrier wave of different TA, to the base station initiating random access procedure.
Preferably, the random access module 1102 of judge module 1103 judgement arrange the set report condition of module 1101 when the state of forward direction base station initiating random access procedure reaches, and specifically comprise one or more of following situation:
After the judge module 1103 random access module 1102 of judgement are failed to the base station initiating random access procedure by the selected carrier wave of first carrier selection strategy, in default time range, can not be by any one other carrier wave to base station success initiating random access procedure.
After the random access module 1102 of judge module 1103 judgement retransmit preamble in each carrier wave total degree has reached default retransmission threshold value, still can not be to the base station successful initiating random access procedure.
After judge module 1103 judgements are failed to the base station initiating random access procedure by the selected carrier wave of first carrier selection strategy, after the total degree of re-transmission preamble has reached default retransmission threshold value in the second carrier wave, still can not be to base station success initiating random access procedure.
The judge module 1103 random access module 1102 of judgement are failed to the base station initiating random access procedure by the corresponding carrier wave of Special Cell.
The judge module 1103 random access module 1102 of judgement are failed to the base station initiating random access procedure by the best carrier wave of Link State.
The number of carriers that judge module 1103 random access module 1102 initiating random access procedures of judgement are attempted reaches default number of carriers threshold value.
Sending module 1104 is used for judging when the state of forward direction base station initiating random access procedure reaches report condition when judge module 1103, reports the random access problems indication information to the rrc layer of terminal self correspondence.
Compared with prior art, the embodiment of the present invention has the following advantages:
The technical scheme that proposes by using the embodiment of the present invention, clear and definite in mobile communication system due to the introducing of multicarrier, handling process that can initiating random access procedure in a plurality of up-link carriers, thereby, can initiate random access and process in multicarrier system.
Through the above description of the embodiments, those skilled in the art can be well understood to the embodiment of the present invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, the technical scheme of the embodiment of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) each implements the described method of scene to carry out the embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is a preferred schematic diagram of implementing scene, the module in accompanying drawing or flow process might not be that the enforcement embodiment of the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device of implementing in scene can be distributed in the device of implementing scene according to implementing scene description, also can carry out respective change and be arranged in the one or more devices that are different from this enforcement scene.The module of above-mentioned enforcement scene can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number does not represent just to description the quality of implementing scene.
Above disclosed be only the several concrete enforcement scene of the embodiment of the present invention, still, the embodiment of the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into the protection range of the embodiment of the present invention.
Claims (12)
1. the accidental access method in a multicarrier system, is characterized in that, specifically comprises the following steps:
When the terminal that works in simultaneously a plurality of carrier waves needed initiating random access procedure, described terminal was selected a carrier wave, to the base station initiating random access procedure according to default first carrier selection strategy in a plurality of carrier waves of self working;
After described terminal is failed to the base station initiating random access procedure by the selected carrier wave of described first carrier selection strategy, described terminal is according to the second default carrier wave selection strategy, one or more carrier waves are selected in continuation in other carrier waves of self working, to described base station initiating random access procedure;
Wherein, when described terminal judges reached default report condition, described terminal reported the random access problems indication information to the radio resource control RRC layer of self.
2. the method for claim 1, is characterized in that, described terminal is selected a carrier wave according to default first carrier selection strategy in a plurality of carrier waves of self working, and to the base station initiating random access procedure, is specially a kind of in following situation:
Described terminal is carrier wave of random selection in current all optional up-link carriers, to the base station initiating random access procedure;
Described terminal reaches random in the up-link carrier of preset state threshold value at the included Link State of current all optional up-link carriers and selects a carrier wave, to the base station initiating random access procedure;
Described terminal is selected current all optional up-link carrier links carrier wave in the best state, to the base station initiating random access procedure;
Described terminal is selected the corresponding up-link carrier of particular cell Special Cell, to the base station initiating random access procedure.
3. method as claimed in claim 2, is characterized in that, described current all optional up-link carriers specifically comprise:
All up-link carriers that described terminal is worked; Or,
Described terminal work all have the up-link carrier of random access resource configuration; Or,
The described terminal of permission by the network side configuration is initiated random all up-link carriers that access; Or,
Do not reach the up-link carrier of default unsuccessful condition in all up-link carriers that described terminal is worked; Or,
In all up-link carriers that described terminal is worked, be in the up-link carrier of state of activation; Or,
In all up-link carriers that described terminal is worked, be in state of activation, and do not reach the up-link carrier of default unsuccessful condition.
4. method as claimed in claim 3, is characterized in that, described default unsuccessful condition is specially:
At the appointed time carry out random access in scope, and reached still random access failure of maximum times.
5. the method for claim 1, it is characterized in that, after described terminal is initiated described random access procedure failure, described terminal is according to the second default carrier wave selection strategy, one or more carrier waves are selected in continuation in other carrier waves of working at self, to described base station initiating random access procedure, be specially a kind of in following situation:
Described terminal is chosen one or more carrier waves at random in remaining carrier set, to the base station initiating random access procedure;
Described terminal is selected a best carrier wave of Link State in remaining carrier set, to the base station initiating random access procedure;
Described terminal is at the up-link carrier from current initiating random access procedure failure selects one or more carrier waves in the residue carrier wave of different coverings, to the base station initiating random access procedure;
Described terminal has at the up-link carrier from current initiating random access procedure failure selects one or more carrier waves in the carrier wave of different Timing Advance TA, to the base station initiating random access procedure.
6. the method for claim 1, is characterized in that, described terminal judges reaches default report condition, specifically comprises one or more of following situation:
The frequency of failure of described terminal initiating random access procedure in current all carrier waves of self working reaches the maximum frequency of failure of configuration respectively;
Described terminal can not be by any one carrier wave to base station success initiating random access procedure in default time range;
Described terminal after the failure of base station initiating random access procedure, in default time range, can not be passed through any one other carrier wave to base station success initiating random access procedure by the selected carrier wave of described first carrier selection strategy;
After described terminal retransmits preamble in each carrier wave total degree has reached default retransmission threshold value, still can not be to base station success initiating random access procedure;
After described terminal is failed to described base station initiating random access procedure by the selected carrier wave of described first carrier selection strategy, after the total degree of re-transmission preamble has reached default retransmission threshold value in described the second carrier wave, still can not be to described base station success initiating random access procedure; Or,
Described terminal is failed to the base station initiating random access procedure by the corresponding carrier wave of particular cell Special Cell;
Described terminal is failed to the base station initiating random access procedure by the best carrier wave of Link State;
The number of carriers that described terminal initiating random access procedure is attempted reaches default number of carriers threshold value.
7. a terminal, be applied to the random access in multicarrier system, it is characterized in that, specifically comprises:
Module is set, is used for arranging first carrier selection strategy, the second carrier wave selection strategy and report condition;
random access module, be used for when the terminal that works in simultaneously a plurality of carrier waves needs initiating random access procedure, according to the described set first carrier selection strategy of module that arranges, select a carrier wave in a plurality of carrier waves of self working, to the base station initiating random access procedure, maybe when passing through the selected carrier wave of described first carrier selection strategy after the failure of base station initiating random access procedure, according to described the second set carrier wave selection strategy of module that arranges, one or more carrier waves are selected in continuation in other carrier waves of working in described terminal, to described base station initiating random access procedure,
Judge module is used for judging whether described random access module reaches the described set report condition of module that arranges when the state of forward direction described base station initiating random access procedure;
Sending module is used for judging when the state of forward direction described base station initiating random access procedure reaches described report condition when described judge module, reports the random access problems indication information to self rrc layer.
8. terminal as claimed in claim 7, is characterized in that, the described set first carrier selection strategy of module that arranges is specially a kind of in following situation:
Carrier wave of random selection in current all optional up-link carriers is to the base station initiating random access procedure;
Reach random in the up-link carrier of preset state threshold value at the included Link State of current all optional up-link carriers and select a carrier wave, to the base station initiating random access procedure;
Select current all optional up-link carrier links carrier wave in the best state, to the base station initiating random access procedure;
Select the corresponding up-link carrier of Special Cell, to the base station initiating random access procedure.
9. terminal as claimed in claim 8, is characterized in that, described current all optional up-link carriers specifically comprise:
All up-link carriers that described terminal is worked; Or,
Described terminal work all have the up-link carrier of random access resource configuration; Or,
The described terminal of permission by the network side configuration is initiated random all up-link carriers that access; Or,
Do not reach the up-link carrier of default unsuccessful condition in all up-link carriers that described terminal is worked; Or,
In all up-link carriers that described terminal is worked, be in the up-link carrier of state of activation; Or,
In all up-link carriers that described terminal is worked, be in state of activation, and do not reach the up-link carrier of default unsuccessful condition.
10. terminal as claimed in claim 9, is characterized in that, described default unsuccessful condition is specially:
At the appointed time carry out random access in scope, and reached still random access failure of maximum times.
11. terminal as claimed in claim 7 is characterized in that, described the second set carrier wave selection strategy of module that arranges is specially a kind of in following situation:
Choose at random one or more carrier waves in remaining carrier set, to the base station initiating random access procedure;
Select a best carrier wave of Link State in remaining carrier set, to the base station initiating random access procedure;
Be at the up-link carrier from current initiating random access procedure failure and select one or more carrier waves in the residue carrier wave of different coverings, to the base station initiating random access procedure;
Have at the up-link carrier from current initiating random access procedure failure and select one or more carrier waves in the carrier wave of different TA, to the base station initiating random access procedure.
12. terminal as claimed in claim 7, it is characterized in that, the described random access module of described judge module judgement specifically comprises one or more of following situation when the state of forward direction described base station initiating random access procedure reaches the described set report condition of module that arranges:
Described judge module judges the frequency of failure of described random access module initiating random access procedure in all carrier waves that current described terminal is worked, and reaches respectively the maximum frequency of failure of configuration;
Described judge module judgement is in default time range, and described random access module can not be by any one carrier wave to base station success initiating random access procedure;
After the described random access module of described judge module judgement is failed to the base station initiating random access procedure by the selected carrier wave of described first carrier selection strategy, in default time range, can not be by any one other carrier wave to base station success initiating random access procedure;
After the described random access module of described judge module judgement retransmits preamble in each carrier wave total degree has reached default retransmission threshold value, still can not be to the base station successful initiating random access procedure;
After described judge module judgement is failed to described base station initiating random access procedure by the selected carrier wave of described first carrier selection strategy, after the total degree of re-transmission preamble has reached default retransmission threshold value in described the second carrier wave, still can not be to described base station success initiating random access procedure; Or,
The described random access module of described judge module judgement is failed to the base station initiating random access procedure by the corresponding carrier wave of particular cell Special Cell;
The described random access module of described judge module judgement is failed to the base station initiating random access procedure by the best carrier wave of Link State;
The number of carriers that the described random access module initiating random access procedure of described judge module judgement is attempted reaches default number of carriers threshold value.
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| KR101810121B1 (en) | 2011-05-27 | 2017-12-18 | 애플 인크. | Apparatus and method for performing random access in wireless communication system |
| WO2015009043A1 (en) * | 2013-07-19 | 2015-01-22 | Lg Electronics Inc. | Method and apparatus for performing random access procedure in wireless communication system |
| CN110798852B (en) * | 2016-04-19 | 2022-10-25 | 展讯通信（上海）有限公司 | Ad hoc network enhancing method and terminal equipment |
| US20210282181A1 (en) * | 2016-08-20 | 2021-09-09 | Lg Electronics Inc. | Random access procedure supporting nb-iot |
| CN110463331B (en) * | 2017-03-24 | 2022-04-12 | 华为技术有限公司 | Random access method, device, equipment and storage medium |
| CN107820729B (en) * | 2017-07-14 | 2021-05-28 | 达闼机器人有限公司 | Connection reestablishment method and device, terminal and storage medium |
| CN109392048B (en) * | 2017-08-11 | 2022-05-13 | 华为技术有限公司 | Signal sending method, receiving method and device |
| WO2019047781A1 (en) * | 2017-09-08 | 2019-03-14 | Telefonaktiebolaget Lm Ericsson (Publ) | Random access for multiple carrier configurations |
| CN109803335B (en) * | 2017-11-17 | 2022-09-02 | 华为技术有限公司 | Control method and device for access network |
| CN113556824B (en) * | 2017-11-17 | 2024-04-16 | 华为技术有限公司 | Random access method and device |
| US11357068B2 (en) | 2017-12-29 | 2022-06-07 | Beijing Xiaomi Mobile Software Co., Ltd. | Random access failure processing method and apparatus |
| CN110035460A (en) * | 2018-01-11 | 2019-07-19 | 北京三星通信技术研究有限公司 | Accidental access method, the method and relevant device for configuring random access information |
| EP3698595A4 (en) | 2018-01-11 | 2020-12-16 | Samsung Electronics Co., Ltd. | Method of determining frequency-domain offset parameter, user equipment (ue), random access method, method for configuring random access information, corresponding device and computer readable medium |
| RU2758926C1 (en) * | 2018-03-29 | 2021-11-03 | Бейдзин Сяоми Мобайл Софтвэр Ко., Лтд. | Method and apparatus for issuing information, and method and apparatus for operating based on bandwidth parts |
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Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
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Effective date of registration: 20210531 Address after: 100085 1st floor, building 1, yard 5, Shangdi East Road, Haidian District, Beijing Patentee after: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |